OMEGA® ultra-miniature temperature transmitters convert millivolt inputs from thermocouples or resistance from RTDs into 4 to 20 mA outputs. Transmitters are available in color-coded enclosures covering the four most popular thermocouple types (J, K, T, and E) as well as three-wire 100 Ω platinum RTDs.

Featuring state-of-the-art integrated circuits and electronic design, these ultra-compact transmitters have a diameter of only 35.6 mm (1.40") and are designed to fit inside many compact thermowell protection heads, such as the Omega® NB2. Omega also provides complete thermocouple and RTD assemblies.

TX93A and TX94A transmitters can eliminate long runs of costly field wiring in a variety of applications. A stable 4 to 20 mA output signal is produced proportional to the transmitter’s specific input type and calibrated temperature range (see Range Code table, right). Adjustability of ±25% for zero and span is provided to facilitate some rangeability. The transmitted signal eliminates noise pickup, voltage drops, and multiple cold junction errors, and it requires only a twisted pair of copper wires for loop connections.

All models and ranges of these ultra-miniature transmitters are available with fully epoxy-potted electronics (specify “-P” option), which give ultimate protection in extreme environments.

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Sensor Type and Temperature Range select from:J1 for J Thermocouple -40 to 49°C (-40 to 120°F)E1 for E Thermocouple -40 to 49°C (-40 to 120°F) J2 for J Thermocouple -18 to 93°C (0 to 200°F)K2 for K Thermocouple -18 to 93°C (0 to 200°F)T2 for T Thermocouple -18 to 93°C (0 to 200°F)E2 for E Thermocouple -18 to 93°C (0 to 200°F)J3 for J Thermocouple -18 to 149°C (0 to 300°F)K3 for K Thermocouple -18 to 149°C (0 to 300°F)T3 for T Thermocouple -18 to 149°C (0 to 300°F)E3 for E Thermocouple -18 to 149°C (0 to 300°F)J4 for J Thermocouple -18 to 260°C (0 to 500°F)K4 for K Thermocouple -18 to 260°C (0 to 500°F)T4 for T Thermocouple -18 to 260°C (0 to 500°F)E4 for E Thermocouple -18 to 260°C (0 to 500°F)J5 for J Thermocouple -18 to 399°C (0 to 750°F)K5 for K Thermocouple -18 to 399°C (0 to 750°F)E5 for E Thermocouple -18 to 399°C (0 to 750°F)J6 for J Thermocouple -18 to 538°C (0 to 1000°F)K6 for K Thermocouple -18 to 538°C (0 to 1000°F)E6 for E Thermocouple -18 to 538°C (0 to 1000°F)1 for RTD -40 to 49°C (-40 to 120°F)2 for RTD -18 to 93°C (0 to 200°F)3 for RTD -18 to 149°C (0 to 300°F)4 for RTD -18 to 260°C (0 to 500°F)5 for RTD -18 to 399°C (0 to 750°F)6 for RTD -18 to 538°C (0 to 1000°F)

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Optional select from:Nothing(leave field blank) for no option-P for Fully Epoxy-Potted Electronics for extreme environments

Note: All combinations may not be valid, check spec sheet for valid part numbers.